Curtain-rod lock.



C. W. KIRSCH.

CURTAIN ROD LOCK. APPLICATION FILED SEPT-23', 1912'.

Patented J 1 10 8, 1915.

ITED snares PATENT @FFKQE CHARLES W. KIRSCH, OF STURGIS, MICHIGAN, ASSIG-NOR TO' KIRSCH MANUFACTURING 00., 0F STURGIS', MICHIGAN, A COBPORATION OF MICHIGAN.

ounr-Am-non LocK.

Specification of Letters Patent.

Patented J une 8, 1915.

Application filed September 2s, 1912. ,Serial No. 721,834.

To all whom it may concern Be it known that I, CHARLES W. KIRSCH, citizen of the United States, residing at Sturgis, in the county of St. Joseph and State of illlichigan, have invented certain new and seful Improvements in Curtain- Rod Locks; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in extensible or adjustable curtain rods and has for its object to provide a telescopically adjustable curtain rod and means for looking the relatively movable parts against such relative movement after the rod has. been adjusted to the desired length.

The invention resides in the features of construction and combinations of parts hereinafter fully described and particularly claimed.

In the accompanying drawings illustrating the invention: Figure 1- is a frag-v mentary view in elevation of the inner face of a curtain rod composed of two telescopically interfitting parts and showing the locking means engaged therein in position to prevent relative telescopic movement of said parts. Fig. 2 is a detail vertical transverse section of the same on the line 22 of Fig. 1. Fig..3- is a detail perspective view of a wrench employed for operating the locking device. Fig. 4.- is a detail perspective view of one of the locking devices.

My invention relates particularly to that type of curtain rod made of sheet metal and comprises flat strips A and C each having U-shaped opposed flanges B and D respectively, and which are made in such relative Widths and dimensions as to enable the part A to fit telescopically within the similar part C. The said interfitting parts of the two channel-shaped members A and C may be of any desired number and relative sizes to build up curtain rods or the like of any desired lengths.v

Telescopically adjustable curtain rods are very convenient and easily adjusted in length but when so adjusted they are also easily thrown out of adjustment by accident or careless handling and it is sometimes a matter of considerable difficulty, especially when the curtains are mounted on the rod,

.between the flanges D of the latter. said disk E is provided in its middle per-- to readjust the same preparatory to hanging the rod on its supports.

The particular object of the present invention is to provide simple and eflicient'means for locking the two or more parts of a curtain rod of the type described against relative movement after the same has been once adjusted to ,the proper length. The said tion with an elongated slot F in which the end of the arm G of the wrench H is adapted to engage and by means of which said disk E may be turned through an arc of ninety degrees more or less when disposed .within the rod A thereby causing the flanges B thereof to be expanded and thus to frictionally engage the flanges D of the rod C'to prevent relative telescopic movement of-said rods A and C except by the exercise of great force. While one of said disks E is'usually suflicient to effectually prevent relative telescopic movement of two rods A and C several of said disks may be inserted as indicated in Fig. 1.

It will be obvious that the slots betweenthe opposed flanges of both of the members, A and C, will readily permit access to the disk or cam E, so that the latter may be partially rotated to expand an adjacent portion of the member A against the part of the member C, which otherwise slidably overlaps the said portion ofthe member A, and that when the said cam is released from its expanding position, the resiliency of the member A will return the said portion of the latter to its former loose fitting of the adjacent part of the member C. It will also be evident that by using a locking element E,'loosely slidable within the smaller of the portion of the first member and operable through the slot of both members for ex panding the said portion of the first mem her into engagement with the adjacent part of the second member, the resiliency of the portion thus expanded returning the said portion of the first member to its normal size upon a release of the said expanding means.

2. A curtain rod including a pair of channel-shaped members each equipped with opposed overhanging flanges bordering a slot longitudinal of the member carrying said flanges, the first of said members made of resilient material and presenting a portion disposed With a part of the second member, the said portion being normally contracted by its own resiliency to loosely fit the adj acent part of the second member; a cam disposed within the said ortion of one of said members,- and means operable through both said slots for rotating said cam to cause the latter to expand the said portion of the first member into interlocking engagement with the adjacent part of the second member.

In testimony whereof I have signed my name in presence of two subscribing Witnesses.

CHARLES W. KIRSCH.

Witnesses E. G. WIGHT, J. R. MATTHEW. 

